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Cheap flights from Ontario to Missouri from C$ 196

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Missouri departing on 29/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Find the cheapest flights from Ontario to Missouri

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:10 a.m. - 10:34 p.m.
YYZ
-
STL
16h 24m1 stop
Multiple Airlines Logo
5:11 p.m. - 2:20 p.m.
STL
-
YYZ
20h 09m1 stop
C$ 315Multiple Airlines
Thu, 15 Jan - Sun, 18 Jan
Multiple Airlines Logo
7:00 a.m. - 4:09 p.m.
YYZ
-
MCI
34h 09m2 stops
Multiple Airlines Logo
11:26 a.m. - 11:20 p.m.
MCI
-
YYZ
10h 54m1 stop
C$ 364Multiple Airlines
Mon, 2 Feb - Thu, 5 Feb
Multiple Airlines Logo
5:15 p.m. - 4:09 p.m.
YYZ
-
MCI
23h 54m1 stop
Multiple Airlines Logo
11:26 a.m. - 11:20 p.m.
MCI
-
YYZ
10h 54m1 stop
C$ 374Multiple Airlines
Mon, 2 Feb - Thu, 5 Feb
United Airlines Logo
5:55 p.m. - 11:59 p.m.
YOW
-
STL
7h 04m1 stop
United Airlines Logo
3:11 p.m. - 9:18 p.m.
STL
-
YOW
5h 07m1 stop
C$ 426United Airlines
Mon, 2 Feb - Mon, 9 Feb
United Airlines Logo
6:20 a.m. - 2:27 p.m.
YOW
-
MCI
9h 07m1 stop
United Airlines Logo
8:00 a.m. - 9:56 p.m.
MCI
-
YOW
12h 56m2 stops
C$ 429United Airlines
Tue, 3 Feb - Wed, 4 Feb
American Airlines Logo
11:30 a.m. - 9:15 p.m.
YYZ
-
STL
10h 45m1 stop
American Airlines Logo
6:00 a.m. - 4:03 p.m.
STL
-
YYZ
9h 03m1 stop
C$ 440American Airlines
Tue, 3 Feb - Wed, 4 Feb
American Airlines Logo
3:50 p.m. - 10:20 a.m.
YUL
-
STL
19h 30m1 stop
American Airlines Logo
6:00 a.m. - 3:08 p.m.
STL
-
YUL
8h 08m1 stop
C$ 454American Airlines
Mon, 2 Feb - Mon, 9 Feb
Delta Logo
5:40 a.m. - 4:42 p.m.
YOW
-
STL
12h 02m2 stops
Delta Logo
3:58 p.m. - 12:39 a.m.
STL
-
YOW
7h 41m2 stops
C$ 522Delta
Thu, 26 Mar - Mon, 30 Mar
Delta Logo
7:30 p.m. - 5:31 p.m.
YUL
-
STL
23h 01m1 stop
Delta Logo
6:35 a.m. - 12:12 p.m.
STL
-
YUL
4h 37m1 stop
C$ 689Delta
Fri, 16 Jan - Mon, 19 Jan
Air Canada Logo
8:50 a.m. - 3:29 p.m.
YUL
-
STL
7h 39m2 stops
Air Canada Logo
4:05 p.m. - 11:22 p.m.
STL
-
YUL
6h 17m1 stop
C$ 774Air Canada
Fri, 16 Jan - Mon, 19 Jan

Alaska Airlines flights from Region of Ontario to Missouri

Our best Alaska Airlines deals on Region of Ontario to Missouri flight tickets
Alaska Airlines
22 Jan
YYZ4:45 p.m.Toronto Pearson Intl
31h 39m
1 stop
MCI11:24 p.m.Kansas City
26 Jan
MCI2:45 p.m.Kansas City
23h 50m
1 stop
YYZ3:35 p.m.Toronto Pearson Intl
C$ 552
Find similar
Alaska Airlines
22 Jan
YYZ4:45 p.m.Toronto Pearson Intl
22h 05m
1 stop
MCI1:50 p.m.Kansas City
26 Jan
MCI2:45 p.m.Kansas City
23h 50m
1 stop
YYZ3:35 p.m.Toronto Pearson Intl
C$ 607
Find similar
Alaska Airlines
22 Jan
YYZ4:45 p.m.Toronto Pearson Intl
31h 39m
1 stop
MCI11:24 p.m.Kansas City
26 Jan
MCI2:45 p.m.Kansas City
23h 50m
1 stop
YYZ3:35 p.m.Toronto Pearson Intl
C$ 621
Find similar

United Airlines flights from Region of Ontario to Missouri

Our best United Airlines deals on Region of Ontario to Missouri flight tickets
United Airlines
2 Feb
YOW5:55 p.m.Ottawa
7h 04m
1 stop
STL11:59 p.m.Lambert-St Louis
9 Feb
STL3:11 p.m.Lambert-St Louis
5h 07m
1 stop
YOW9:18 p.m.Ottawa
C$ 426
Find similar
United Airlines
3 Feb
YOW9:45 a.m.Ottawa
13h 14m
2 stops
MCI9:59 p.m.Kansas City
4 Feb
MCI8:00 a.m.Kansas City
12h 56m
2 stops
YOW9:56 p.m.Ottawa
C$ 429
Find similar
United Airlines
31 Jan
YOW5:11 p.m.Ottawa
5h 48m
1 stop
MCI9:59 p.m.Kansas City
2 Feb
MCI11:29 a.m.Kansas City
8h 49m
1 stop
YOW9:18 p.m.Ottawa
C$ 430
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Region of Ontario to Missouri that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 96,600 searches. Data last updated 21 December 2025.
Use the filters below to find and compare flights from Ontario to Missouri that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 15/1

7:10 a.m.-10:34 p.m.

1 stop16h 24m

Lambert-St Louis

Sun 18/1

5:11 p.m.-2:20 p.m.

1 stop20h 09m

C$ 315

TorontoKansas City

YYZ - MCI

YYZMCI

Toronto Pearson Intl

Mon 2/2

7:00 a.m.-4:09 p.m.

2 stops34h 09m

Kansas City

Thu 5/2

11:26 a.m.-11:20 p.m.

1 stop10h 54m

C$ 364

TorontoKansas City

YYZ - MCI

YYZMCI

Toronto Pearson Intl

Mon 2/2

5:15 p.m.-4:09 p.m.

1 stop23h 54m

Kansas City

Thu 5/2

11:26 a.m.-11:20 p.m.

1 stop10h 54m

C$ 374

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Mon 2/2

5:55 p.m.-11:59 p.m.

1 stop7h 04m

Lambert-St Louis

Mon 9/2

3:11 p.m.-9:18 p.m.

1 stop5h 07m

C$ 426

OttawaKansas City

YOW - MCI

YOWMCI

Ottawa

Tue 3/2

6:20 a.m.-2:27 p.m.

1 stop9h 07m

Kansas City

Wed 4/2

8:00 a.m.-9:56 p.m.

2 stops12h 56m

C$ 429

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 3/2

11:30 a.m.-9:15 p.m.

1 stop10h 45m

Lambert-St Louis

Wed 4/2

6:00 a.m.-4:03 p.m.

1 stop9h 03m

C$ 440

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 2/2

3:50 p.m.-10:20 a.m.

1 stop19h 30m

Lambert-St Louis

Mon 9/2

6:00 a.m.-3:08 p.m.

1 stop8h 08m

C$ 454

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Thu 26/3

5:40 a.m.-4:42 p.m.

2 stops12h 02m

Lambert-St Louis

Mon 30/3

3:58 p.m.-12:39 a.m.

2 stops7h 41m

C$ 522

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 16/1

7:30 p.m.-5:31 p.m.

1 stop23h 01m

Lambert-St Louis

Mon 19/1

6:35 a.m.-12:12 p.m.

1 stop4h 37m

C$ 689

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 16/1

8:50 a.m.-3:29 p.m.

2 stops7h 39m

Lambert-St Louis

Mon 19/1

4:05 p.m.-11:22 p.m.

1 stop6h 17m

C$ 774

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Missouri from

How to get the cheapest flight ticket from Region of Ontario to Missouri

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Missouri?

The month of April is, on average, the cheapest month to fly to Missouri from Region of Ontario, with most prices found around C$ 666. If you are unable to visit Missouri during the month of April, then departing from Region of Ontario during the month June is also very affordable. Most momondo users find prices during this month for around C$ 682.

What is the cheapest time of day to depart on your flight to Missouri?

Our data shows that the cheapest Region of Ontario to Missouri flights are usually those with departure times in the afternoon. Our users have found flights to Missouri in the afternoon for as low as C$ 770. In the evening is when there is more demand to fly to Missouri, so prices are often more expensive at around C$ 875 per ticket.

What is the cheapest Ontario to Missouri flight route?

Fly from Toronto Pearson Intl to Lambert-St Louis for the best Ontario - Missouri flight prices

How far in advance should I book a flight to Missouri?

You are more likely to see cheaper flights to Missouri from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Missouri for around C$ 773 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Missouri from Region of Ontario for as low as C$ 540 on momondo.

What cabin class options are available on Ontario to Missouri flights?

There is only 1 cabin class available to choose from on Ontario to Missouri flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Region of Ontario to Missouri flights?

You could potentially save up to 42% on your flight if you consider stops on a Region of Ontario to Missouri flight.

Cheap Region of Ontario to Missouri flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Missouri

Best price found

C$ 477

Fastest flight time

2h 14m

Direct flights

Every day

Airports in Missouri

55 airports
The best flight deal from Region of Ontario to Missouri found on momondo in the last 72 hours is C$ 477
The fastest flight from Region of Ontario to Missouri takes 2h 14m
Direct flights go from Region of Ontario to Missouri every day.
There are 55 airports in Missouri. From Region of Ontario there are direct flights to Lambert-St Louis (STL).
Search flight deals

  • When did momondo last update prices for flights from Ontario to Missouri?

    Prices for flights from Ontario to Missouri are refreshed on a daily basis.

  • How many operators does momondo search for flights from Ontario to Missouri?

  • How old do you have to be to fly from Ontario to Missouri?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario to Missouri.

  • What documentation or ID do you need to fly to Missouri?

    The necessary travel and health documents for your Missouri trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Region of Ontario to Missouri?

Best airlines flying from Region of Ontario to Missouri

Compare and see reviews for airlines that fly from Region of Ontario to Missouri with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom C$ 372Free CancellationRating
7.2
11,050 reviews
Search American Airlines flights
United AirlinesPriceFrom C$ 413Free CancellationRating
7.4
9,099 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 427Free CancellationRating
7.1
10,549 reviews
Search Air Canada flights
DeltaPriceFrom C$ 474Free CancellationRating
7.9
8,021 reviews
Search Delta flights
WestJetPriceFrom C$ 557Free CancellationRating
7.2
3,208 reviews
Search WestJet flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Missouri?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Missouri from Ontario.

Can I find flights from Ontario to Missouri with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Ontario to Missouri flights to just show those with flexible booking policies.

How can momondo help me find flights from Ontario to Missouri?

Once all potential Ontario to Missouri flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Ontario to Missouri right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Ontario to Missouri flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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